/*
 * Clock
 */

#include "Clock.h"
#include <windows.h>

#define QueryFrequency(variable)	QueryPerformanceFrequency((LARGE_INTEGER*)variable)
#define QueryCounter(variable)		QueryPerformanceCounter((LARGE_INTEGER*)variable)

/*
 * Clock
 */
Clock::Clock()
{
	QueryFrequency(&nFrequency);
}

/*
 * Reset
 */
void Clock::Reset()
{
	QueryCounter(&nCurrent);
}

/*
 * GetElapsed
 */
float Clock::GetElapsed(bool bReset)
{
	unsigned __int64 nTicks = 0;
	QueryCounter(&nTicks);

	const float fElapsed = (nTicks - nCurrent) / (float)nFrequency;

	if(bReset)
	{
		Reset();
	}

	return fElapsed;
}